From: Biju Das <biju.das.jz@bp.renesas.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
William Breathitt Gray <william.gray@linaro.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
"linux-renesas-soc@vger.kernel.org"
<linux-renesas-soc@vger.kernel.org>,
"linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>,
Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>,
Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Subject: RE: [PATCH 0/6] Add RZ/V2M Compare-Match Timer (TIM) support
Date: Tue, 6 Dec 2022 09:45:27 +0000 [thread overview]
Message-ID: <OS0PR01MB59224B6915F3E2D68D06ADDA861B9@OS0PR01MB5922.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <87sfhsgb9e.ffs@tglx>
> Subject: Re: [PATCH 0/6] Add RZ/V2M Compare-Match Timer (TIM) support
>
> On Tue, Dec 06 2022 at 09:40, Geert Uytterhoeven wrote:
> > On Tue, Dec 6, 2022 at 9:13 AM Biju Das <biju.das.jz@bp.renesas.com>
> wrote:
> >> > Do you have any use case to really switch. Doing so disables the
> >> > vDSO access to the clocksource.
> >>
> >> Not really. Architecture timer should be sufficient for clocksource.
> >
> > When multiple clocksources are registered, the clocksource subsystems
> > picks the best one anyway, right?
>
> As it does for the clock event devices. If there is an architected timer
> then that should be always preferred.
>
> No idea why there is a need for the extra hardware and the drivers which
> are both never utilized.
Maybe, if you use secure OS, this timer hardware can be used there.
If you use PM deep states, Maybe, it could be used as broadcast event for waking up the system??
Cheers,
Biju
next prev parent reply other threads:[~2022-12-06 9:47 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-05 14:59 [PATCH 0/6] Add RZ/V2M Compare-Match Timer (TIM) support Biju Das
2022-12-05 14:59 ` [PATCH 1/6] clk: renesas: r9a09g011: Add TIM clock and reset entries Biju Das
2022-12-21 14:47 ` Geert Uytterhoeven
2022-12-05 14:59 ` [PATCH 2/6] dt-bindings: timer: Add RZ/V2M TIM binding Biju Das
2022-12-05 14:59 ` [PATCH 3/6] clocksource/drivers/rzv2m-tim: Add Renesas RZ/V2M compare match timer(TIM) driver Biju Das
2022-12-05 14:59 ` [PATCH 4/6] dt-bindings: counter: Add RZ/V2M TIM counter binding Biju Das
2022-12-05 14:59 ` [PATCH 5/6] counter: Add Renesas RZ/V2M TIM counter driver Biju Das
2022-12-05 14:59 ` [PATCH 6/6] arm64: dts: renesas: r9a09g011: Add tim nodes Biju Das
2022-12-05 22:50 ` [PATCH 0/6] Add RZ/V2M Compare-Match Timer (TIM) support Rob Herring
2022-12-06 8:13 ` Biju Das
2022-12-06 8:40 ` Geert Uytterhoeven
2022-12-06 8:57 ` Thomas Gleixner
2022-12-06 9:45 ` Biju Das [this message]
2022-12-07 7:52 ` Biju Das
2022-12-07 10:53 ` Thomas Gleixner
2022-12-07 11:35 ` Biju Das
2022-12-07 16:49 ` Thomas Gleixner
2022-12-09 22:24 ` William Breathitt Gray
2022-12-10 7:52 ` Biju Das
2022-12-10 10:59 ` Thomas Gleixner
2022-12-06 8:59 ` Biju Das
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